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首页> 外文期刊>Crystal growth & design >Crystal engineering of complexes of propane-1,2,3-tricarboxylic acid (H(3)tca) with lanthanide(III) cations
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Crystal engineering of complexes of propane-1,2,3-tricarboxylic acid (H(3)tca) with lanthanide(III) cations

机译：丙烷1,2,3-三羧酸（H（3）tca）与镧系元素（III）阳离子的配合物的晶体工程

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摘要

The knowledge of the one-synthon based supramolecular network of the propane-1,2,3-tricarboxylic acid (H(3)tca), commonly referred to as tricarballylic acid (1), induced us to look for new architectures of tricarballylate-containing lanthanide(III) cations having in mind that the structure of the complex [Ce(tca)(H2O)(2)](n) is the only reported example of this type of compounds. Three novel complexes of formulas [Gd(tca)(H2O)(3)](n)center dot nH(2)O (2), [Eu(tca)(H2O)(3)](n)center dot nH(2)O (3), and [La-2(tca)(2)(H2O)(5)](n)center dot 4nH(2)O (4) have been synthesized, and their structures have been determined by X-ray diffraction on single crytals. 2 and 3 are isomorphous compounds. They exhibit a layered structure where the lanthanide atoms are nine-coordinated with three water molecules and six carboxylate-oxygen atoms building a monocapped. square antiprism surrounding and the tca ligands adopting a tris-bidentate coordination mode. 4 has a three-dimensional structure where two 10-coordinated, crystallographically independent lanthanum atoms [La(1) and La(2)] occur with three/two [La(1)/La(2)] water molecules and seven/eight [La(1)/La(2)] carboxylate-oxygens describing bicapped square antiprism surroundings. Two different tca groups are present in 4 both having in common the tris-bidentate coordination mode but acting in addition as monodentate and bis-monodentate ligands through one and two carboxylate groups, respectively.
机译：丙烷-1,2,3-三羧酸（H（3）tca）（通常称为三碳烯丙酸（1））的基于一合成子的超分子网络知识，促使我们寻找三碳烯丙酸酯的新结构，考虑到配合物[Ce（tca）（H2O）（2）]（n）的结构是此类化合物的唯一报道实例，因此含有镧系元素（III）阳离子。三种新颖的式[Gd（tca）（H2O）（3）]（n）中心点nH（2）O（2），[Eu（tca）（H2O）（3）]（n）中心点nH（ 2）O（3）和[La-2（tca）（2）（H2O）（5）]（n）中心点4nH（2）O（4）已合成，并且它们的结构已由X确定单个晶状体的X射线衍射。 2和3是同构化合物。它们表现出层状结构，其中镧系元素原子与三个水分子和六个羧酸盐-氧原子九配位，构成一个单封端。方形的反棱镜周围，tca配体采用三齿双配位模式。 4具有三维结构，其中两个10配位，晶体学上独立的镧原子[La（1）和La（2）]与三个/两个[La（1）/ La（2）]水分子和七个/八个[La（1）/ La（2）]羧酸盐氧，描述了两方形反棱镜环境。 4中存在两个不同的tca基团，它们都具有共同的三双配位模式，但分别通过一个和两个羧酸酯基团充当单齿和双单齿配体。

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